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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Sascha Hauer <s.hauer@pengutronix.de>,
	BAREBOX <barebox@lists.infradead.org>
Cc: "Claude Sonnet 4.5" <noreply@anthropic.com>
Subject: Re: [PATCH v2 14/21] ARM: exceptions: make in-binary exception table const
Date: Tue, 6 Jan 2026 15:00:38 +0100	[thread overview]
Message-ID: <8962f135-6720-48ec-a549-b28f84280f15@pengutronix.de> (raw)
In-Reply-To: <20260106-pbl-load-elf-v2-14-487bc760f045@pengutronix.de>



On 1/6/26 1:53 PM, Sascha Hauer wrote:
> When making the .text section const we can no longer modify the code.
> On ARMv5/v6 we finally use a copy of the exception table anyway, so
> instead of modifying it in-place and copy afterwards, copy it first and
> then modify it.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

> +/* This struct must match the assembly exception table in exceptions_32.S */

One could add offset definitions to arch/arm/lib/asm-offsets.c and reuse
it this way, but I am fine duplicating it.

>  #ifdef CONFIG_ARM_EXCEPTIONS
> -void arm_fixup_vectors(void);
> +void arm_fixup_vectors(void *table);
>  ulong arm_get_vector_table(void);
>  #else
> -static inline void arm_fixup_vectors(void)
> +static inline void arm_fixup_vectors(void *table)
>  {
>  }

I am still wondering why the assemble code couldn't emit relocations,
but let's get this over with for now.

Cheers,
Ahmad

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  reply	other threads:[~2026-01-06 14:01 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-06 12:53 [PATCH v2 00/21] PBL: Add PBL ELF loading support with dynamic relocations Sascha Hauer
2026-01-06 12:53 ` [PATCH v2 01/21] elf: only accept images matching the native ELF_CLASS Sascha Hauer
2026-01-06 12:58   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 02/21] elf: build for PBL as well Sascha Hauer
2026-01-06 13:26   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 03/21] elf: add dynamic relocation support Sascha Hauer
2026-01-06 13:51   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 04/21] ARM: implement elf_apply_relocations() for ELF " Sascha Hauer
2026-01-06 13:07   ` Ahmad Fatoum
2026-01-06 14:25     ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 05/21] riscv: define generic relocate_image Sascha Hauer
2026-01-06 13:10   ` Ahmad Fatoum
2026-01-06 13:11     ` Sascha Hauer
2026-01-06 12:53 ` [PATCH v2 06/21] riscv: implement elf_apply_relocations() for ELF relocation support Sascha Hauer
2026-01-06 13:11   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 07/21] elf: implement elf_load_inplace() Sascha Hauer
2026-01-06 13:53   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 08/21] elf: create elf_open_binary_into() Sascha Hauer
2026-01-06 13:55   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 09/21] Makefile: add barebox.elf build target Sascha Hauer
2026-01-06 13:13   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 10/21] PBL: allow to link ELF image into PBL Sascha Hauer
2026-01-06 13:18   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 11/21] mmu: add MAP_CACHED_RO mapping type Sascha Hauer
2026-01-06 13:14   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 12/21] mmu: introduce pbl_remap_range() Sascha Hauer
2026-01-06 13:15   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 13/21] ARM: use relative jumps in exception table Sascha Hauer
2026-01-06 13:57   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 14/21] ARM: exceptions: make in-binary exception table const Sascha Hauer
2026-01-06 14:00   ` Ahmad Fatoum [this message]
2026-01-06 12:53 ` [PATCH v2 15/21] ARM: linker script: create separate PT_LOAD segments for text, rodata, and data Sascha Hauer
2026-01-06 14:05   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 16/21] ARM: link ELF image into PBL Sascha Hauer
2026-01-06 14:06   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 17/21] ARM: PBL: setup MMU with proper permissions from ELF segments Sascha Hauer
2026-01-06 14:10   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 18/21] riscv: link ELF image into PBL Sascha Hauer
2026-01-06 14:11   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 19/21] riscv: linker script: create separate PT_LOAD segments for text, rodata, and data Sascha Hauer
2026-01-06 14:12   ` Ahmad Fatoum
2026-01-08 15:25     ` Sascha Hauer
2026-01-06 12:53 ` [PATCH v2 20/21] riscv: Allwinner D1: Drop M-Mode Sascha Hauer
2026-01-06 13:11   ` Ahmad Fatoum
2026-01-06 12:53 ` [PATCH v2 21/21] riscv: add ELF segment-based memory protection with MMU Sascha Hauer
2026-01-06 14:20   ` Ahmad Fatoum

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